Release Time:2019-10-19  Hits:

Indexed by: Journal Article

Date of Publication: 2019-04-24

Journal: ACS APPLIED MATERIALS & INTERFACES

Included Journals: EI、SCIE、PubMed

Volume: 11

Issue: 16

Page Number: 14862-14870

ISSN: 1944-8244

Key Words: metal-organic framework thin films; CoS1.097@N-doped carbon film; dye-sensitized solar cells; counter electrode; SURMOF; electrocatalysis

Abstract: An effective design for counter electrode (CE) catalytic materials with superior catalytic activity, excellent stability, low cost, and a facile fabrication process is urgently needed for industrialization of dye-sensitized solar cells (DSSCs). Herein, we report a facile in situ method to fabricate transparent CoS1.097 anchored on an N-doped carbon film electrode through sulfurization of a cobalt metalloporphyrin metal organic framework thin film on fluorine-doped tin oxide glass. The transparent film as counter electrode in bifacial DSSCs exhibited higher power conversion efficiency (9.11% and 6.64%), respectively, from front and rear irradiation than that of Pt (8.04% and 5.87%). The uniformly dispersed CoS1.097, nanoparticles on an N-doped carbon film provide a large catalytic active area and facilitate the electron transfer, which leads to the excellent catalytic ability of the CoS1.097@N-doped carbon film. In addition, the in situ preparation of the uniform film with a nanosheet structure offers high electrical conductivity and unobstructed access for the diffusion of triiodide to available electroactive sites, resulting in excellent device performance with superior long-term stability over 1000 h under natural conditions.